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(No Model.)

P. G. HAMMOND.

BEAM SCALES.

No. 416,261. Patented Dec, 3, 1889.

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- UNITED STATES PATENT ()FEIcE.

FRED HAMMOND, OF SPRINGFIELD, VERMONT, ASSIGNOR OF, ONE-HALF TO \VILLIAM L. \VHITCOHB, OF SAME PLACE.

BEAM-SCALES.

SPECIFICATION forming part of Letters Patent No. 416,261, dated December 3, 1889.

Serial No. 317,856. (No model.)

To all whom it may concern.-

Be it known that I, FRED O. HAMMOND, of Springfield, county of Windsor and State of Vermont, have invented a certain new and useful Improvement in Beam-Scales, of which I declare the following to be a full, clear, and exact description, reference being had to the accompanying sheet of drawings, forming part of this specification.

This invention relates to improvements in weighing-scales, such as are commonly termed beam-scales, which are made to balance by means of a poise that is moved back and forth along the beam; and the invention consists of a beam-scale provided with a poise, and mechanism whereby the same is actuated, and of a recording attachment to be used in connection therewith, constructed and operating substantially in the manner and for the purpose herein described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of the invention, partly in section; Fig. 2, a crosssection in the plane 2 2, Fig. 1; Fig. 3, a cross-section inthe planes 3 3, Fig. 1; Fig. 4, a detail of one of the standards of the recording-rollen Similar letters of reference indicate like parts in the several views.

The object of this invention is to render a platform-scale, a grocers counter-scale, or any other similar beam-scale automatic with respect to the balancing of the beam by the poise and the indicating or recording of the weight. This object is effected by means of a rolling poise in connection with a sliding index.

The drawings represent the upper portion of a platform-scale, and the invention is herein described as applied to such a scale; but these drawings, with the description, will enable the invention to be thoroughly understood, so that it can also be readily embodied in beam-scales of other forms.

The beam, poise, and index are designated, respectively, by A, B, and G. The poise is round and is mounted on the beam, being kept in place by the groove a, in which the edge of the beam is received, and from each face of the poise projects a small pin 1), which is coincident with the axis of the poise.

The beam is not graduated or notched along its upper edge, as such beams usually are, and it is hung in such a manner that the straight portion of its upper edge passes above and below the horizontal plane Z Z as the outer end of the beam is elevated and depressed, thus causing the edge when in one position to incline toward the standard and in the opposite direction when in the other posit-ion. The index rests and slides freely upon a bar c, and its lower portion extends downward in two branches or limbs (Z d, which stand 011 opposite sides of the poise, as shown in Fig 2, when this passes beneath the index, and with which the pin Z) of the poise either comes in contact or under which it passes, according to the position of the beam. The pointer e of the index projects up through a slot f in the ordinary arm D of the scale-frame, and behind the pointer is fixed a graduated plate E. The bar 0 is supported by the frame, to which it may be attached in any convenient manner. It has near its inner end a curved shoulder c.

To the bracket F, near the outer end of the arm D, is secured a slide G, through which, as well as through the bracket F, the beam passes. This slide has a vertical movement, and is held in place by a suitable guide. A

latch 9 supports it in its highest position,

while a spring 72. tends to push it downward. The bar c'and plate E are inclined slightly away from the standard of the scale for reasons that will hereinafter appear.

The operation of that portion of the inven- 8 5 tion which has been described may here be explained. The parts of the scale being in" the respective positions in which they appear in Fig. l, and the article to be weighedbeing placed upon the scale, the outer end of the 0 beam is thrown upward and the latch g is thereby tripped, 'so that the spring it pushes the slide G against the beam. The power of the spring is such that in case the weight upon the scale is not greater than the high- 5 est number of pounds indicated on the graduated plate E, then the outer end of the beam will at once be forced downward by the slide; but in case the weight is greater than the number of pounds thus indicated a weight or Lil weights of the ordinary kind should be added at the outer end of the beam until the resistance thereof to the spring becomes somewhat. less than the power of the spring, whereupon the springs action will be the same as in the former case. The end of the beam is thus depressed to such an extent that the edge on which the poise travels is inclined away from the standard; but the beam isnot forced by the slide down to the bottom of the opening in the bracket F. This inclination of the beam causes the poise to roll forward, and in so doing it pushes before it the index 0. When the poise reaches the proper point, the beam balances, its outer end falls as far as the bracket F will allow it to go, and the index is left at that point by the poise, which drops, so that the pin 1) passes under the limbs d d and the poise rolls on until it meets the bracket F. The index then marks on the plate E the weight of the article on the scale or the excess of its weight over the amount represented by the weight or weights at the end of the beam. Upon the end of the beam being lifted with the hand this will again be held up by the latch, and the inclination being reversed the poise will roll toward the standard, and when it reaches the index this will be carried along by it, since the poise will then have been raised far enough to allow the pin 1) to once more strike the limbs (Z (Z of the index. This will be carried back in the manner described to the curved shoulder c, and here the momentum of the poise will tip the index and force it up on the shoulder, so that the pin 5 will pass under the limbs (Z (Z, and then the index will fall back, guided by the curved surface of the shoulder, into its proper position on the bar 0.

Provision is made for obtaining a certain number of pounds of a commodity-as, for instance, grain or eoal-in the following manner: A bar If is pivoted to links h and h, each of which is also pivoted to some stationary portion of the scale, as the arm D, a suitable handle being fixed to the link 7t and the bar H being so located that it shall press against the index C when the links are vertical and hold it fast upon the bar 0, as will be understood by reference to Fig. 2. The index now being set to indicate the weight desired, either with or without any number of weights at the outer end of the beam, it is clamped at that point by moving the handle of the link h, and a convenient quantity of the substance to be weighed is placed on the scale. The end of the beam is first thrown up and then forced down by the slide G, as before explained, and the poise rolls forward to the index. The link h is arranged to serve as a stop to limit the descent of the slide G, so that the beam shall not be allowed to fall quite far enough to enable the poise to roll beyond the index, though the beam may fall somewhat below the position to which the spring 7t depresses it. Thus the quantity of the substance on the scale may be increased or decreased until the beam is caused to balance, the same as in the case of an ordinary scale, the poise remaining constantly at the index, since the direction of the inclination of the beam does not change so as to affect the poiseafter the first downward motion of the slide.

The recording attachment now remains to be described. On the arm D a roller H, covered with paper, is mounted in standards i If, and the index C is provided with a needle 7.2, which extends upward close to the under surface of the roller. A pawl Z, fastened to the arm, engages with a ratchet-wheel m at the end of the roller, and to the end of the roller shaft is pivoted a bar it, which passes down near the end of the beam and has at its lower end a proj ection 0. The standard t" is slotted, as appears by Fig. 4, and the bar a has a notch 29 in its edge, into which enters a plate, (shown in Fig. 1,) at the end of the spring 72, and is so weighted at its lower end that this naturally rests close to the end of the scalebeam, and when the shaft is lifted in the slotted standard '1? to the upper end of the slot the notch p is caused by the gravity of the bar a to engage with the plate on the arm and hold the roller in that posit-ion. The roller H being thus elevated, when the outer end of the beam descends under the weight of the poise, as in the operation of the scale above described, the beam strikes the projection 0 of the bar 71, thus forcing the notch 21 off the supporting-plate, and the roller If falls on the needle of the index, which pierces the paper surface of the roller, and thus marks the weight upon it. The roller is returned to its elevated position by the slide G acting against the shaft, when the outer end of the beam is lifted by the hand, and it is at the same time turned slightly on its axis by the pawl-and-ratchet wheel l and no, so that a fresh portion of the surface shall each time be presented to the needle, thus enabling a large number of weights to be recorded upon a single roller. The weightsare read from the roller by the graduations of the scale E.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the beam, the rolling poise mounted on the beam, and the sliding index actuated by the poise, substantially as and for the purpose described.

2. The combination of the beam, a support and stop to regulate the inclination thereof, the rolling poise mounted on the beam, and the sliding index separate from but actuated by the poise, as and for the purpose described.

3. The combination of the beam, the slide G, forming a support and stop to regulate the inclination of the beam, the rolling poise mounted on the beam, and the sliding index actuated by the poise, as and for the purpose described.

4. The combination of the beam, a support and stop to regulate the inclination thereof,

the rolling poise mounted on the beam and provided withthe axial pin 1), and the sliding the rolling poise mounted on the beam, the

inclined bar 0, having the shoulder c, and the sliding index mounted on the bar 0, as and for the purpose described.

6. The combination, in a beam-scale, of a rolling poise and separate index, the index being actuated by the poise when the beam of the scale is inclined to some extent, and being left by the poise when the beam is depressed to a suflicient extent, substantially in the manner and for the purpose described.

7. The combination of the beam, a support and stop to regulate the inclination thereof,

the'rolling poise mounted on the beam, the sliding index coaoting with the poise, and a holding device to fix the "index at different points along its course, substantially as and for the purpose described.

8. The combination of the beam, the slide G, to regulate the inclination thereof, the poise 13, mounted on the beam, the bar 0, the

CAD

index C, mounted thereon, the clamping-bar H, and the link h, which supports the bar II and serves as a stop to limit the descent of the slide G, substantially as and for the purpose described.

9. The combination of the index provided withthe needle 71;, projecting upward above the beam, the roller H, mounted above the index and having a vertical movement, the bar 71, supporting the roller in an elevated position and extending downward therefrom to the level of the beam, and the beam, whereby the bar n is moved to allow the roller to fall upon the needle of the index, substantially as described.

10. The combination of the index, the roller H, having a vertical movement, the pawl and ratchet-wheel Z and m, the bar a, and the beam A, as and for the purpose described.

11. The combination of the index, the roller II, the bar at, the beam acting on the bar, and the slide G, whereby the roller is elevated, as and for the purpose described.

FRED C. HAMMOND.

In presence of JEROME W. PIERCE, FRANK B. PIERCE. 

